Correlation of economically-biological traits between inbreds and hybrids of sunflower

The trials were conducted on experimental fields of VNIIMK (Krasnodar region) in 2012-2014. There were studied correlations of 11 traits in 12 parental lines and 20 hybrids F1 of these lines. The objects of research were: two sterile maternal forms VA 93A -selfpollinated line No 11, Kubansky 93A (a simple sterile hybrid number 12) and ten lines-maintainers unrelated to CMS-testers, including SL 132310B (No 1), SL 133854B (No 2), VK654B (No 3), SL 0516B (No 4), SL 132196B (No 5), SL 132272B (No 6), SL 123876B (No 7), SL 132286B (No 8), SL 132260B (No 9), SL 132266B (No 10). All above mentioned lines possess high or average combining ability on seed yield. The seed of the parental lines and their test-hybrids were obtained in field conditions in 2012. Three-way early ripening hybrid Yupiter was used as a control. The developed 20 hybrids and their parental lines were cultivated on four-row plots with a square of 24.5 sq. m (accounting square is 12.2 sq. m) in 2013-2014. The plant population was 55-60 ths. plants per ha. The phonological observations (a duration of a period emergence-flowering) and biometric measurements (plant height, head inclination, head diameter, quantity of leaves) were conducted during vegetative period. There were determined seeds amount per head, yield and productivity of seeds, oil content and oil yield. True high correlations on such traits as yield, productivity, oil content of seeds and oil yield were revealed by a method of correlative analysis. A significantly high correlation on such traits as plant height (2014), head inclination (2013, 2014), seed amount per head (2013, 2014) and duration of a period emergence-flowering (2014) was revealed between test-hybrids with a simple sterile hybrid Kubansky 93A and paternal lines. Along with that multiple true high meanings of correlation coefficient between studied traits are observed. At the same time a correlation between such trait as amount of leaves per plant and the other ten traits was primary negative.